[Systeminfo] T-e-c buildbreak on mobile profile

This commit fixes buildbreak for mobile profile when using this configuration:
  gbs build -A armv7l --define="profile mobile" -R \
    http://download.tizen.org/snapshots/tizen/mobile/latest/repos/arm/packages/

Build configuration will include systeminfo plugin for profiles - ivi and mobile.
Systeminfo will be excluded in common profile according to current
implementation of system_info_sim_ivi.cc and structure of SysSimInfo class.

BUG=XWALK-2861
Not sure. It's very possible that the desktop build is broken at the moment, or that this file wasn't intended to be built on non-IVI platforms. Looking at c831b3456f72f4e41228196f31aadd036d1aa9d0, I think it's only intended for IVI indeed.

So I'd change this to an `#elif defined(TIZEN_IVI)`.